Patent GB-1116137-A (GB)
Title: Improvements in embossing tools
IPC: B41J3/39
Filed: 1966-08-31
Abstract: 1,116,137. Selective printing; embossing. DYMO INDUSTRIES Inc. 31 Aug., 1966 [20 Sept., 1965], No. 38781/66. Heading B6F. Type-wheel machines; index-setting arrangements; locking devices; embossing plastics materials.-Manually operated embossing tool 10, Fig. 2, comprises a plastics body formed by an upper body portion 66 and a lower body portion 68 interlocked with one another such as by tongues and grooves 82 and the upper body portion 66 is provided with a cylindrical sleeve 56 on which is mounted a lower embossing die 36 having a number of radial, flexible arms carrying respective raised embossing characters and a depending surface 54 forming the bearing surface for an upper embossing die 34 carrying recessed complementary embossing characters, which are adapted to mate with the embossing characters of the lower die over a sector diametrally opposite the embossing station 26 to provide an interlock for the dies as they are indexed for character selection, the interlock being completed by surface 90 and anvil 60 forming a predetermined space between which the mating dies have to pass. Embossing dies 34, 36 are interchangeable. Aligning and embossing arrangements.-Indexed embossing characters are aligned by a spring 142 (Fig. 9), engaging in recesses 144 on the periphery of the upper embossing die and the embossing is effected by anvil 30 of an embossing lever 108, Fig. 2, pivotally mounted in a front wall 70 of the lower body portion 68. Lever is returned to its inoperative position by a sprng 116. Letter-spacing arrangements.-Upward manual pivotal movement of the embossing lever 108, Fig. 2, causes pawl 112, forming a bent lug of a pivotal lever 120 journalled in a recess 122 of the lever 108, to engage a tooth of one or the other of letter-spacing ratchets 114, 118, whereby on return movement of the lever 108 the pawl 112 causes a knurled feed roller 102 to advance the plastics embossing tape 14 through one letter space. Spacing ratchets 114, 118, Fig. 6, are of different diameters and are engaged selectively by the pawl 112 by displacement of a lug 128 depending from the lever 120, to pivot the latter about its pivot 124, the selection of spacing ratchet depending on which of the interchangeable embossing dies 34, 36 are used. Visual indication of indexed embossing characters.-Indexed embossing characters at the embossing station 26, Fig. 2, are shown by indicating characters 62, arranged on the upper embossing die 34 in an aperture 64 of the upper body portion 66. Web, strip feeding, guiding and cutting arrangements; type-wheel construction.-Embossing tape 14, Fig. 2, supplied in two widths, is mounted in a magazine 18 and disposed on an arbor 146 forming an integral part of a door 20 pivotally on hinges 24. Door is provided with ribs which form guides 96, 98 for the respective widths of the tape 14 which is advanced incrementally by the feed roller 102 and coacting leaf-spring 104. The guides 96, 98 are coextensive with guides 86, 88 which pass obliquely through a diametrally offset plane of the upper and lower embossing dies 34, 36 which are of annular construction to permit ready interchangeability by stripping the lower die 34 of the sleeve 56 and then removing the upper die 36, which co-operates with a small circular segment formed by the depending surface 54 (Fig. 9). Following embossing of the tape 14 the dies 34, 36 are indexed to a position in which the index mark " CUT " is shown in the aperture 64 and the plain radial arm 138 on the lower die is provided with a depending lug 139 (Fig. 8) which co-operates with an anvil 140 on the embossing lever 108, which when actuated causes the tape to be scored and cut by cutting dies 130, Fig. 2, the scoring of the tape 14 permitting the peeling off of the backing strip.